Severity Zero is an offensive security firm. We attack AI agents, industrial control systems and embedded devices the way a real adversary would — and prove what actually breaks.
It holds identity, reaches internal systems, acts without a human in the loop and holds sensitive context. The attack surface is not the model itself — it is the entire solution around it: the tools, the data, the identity and every system it can reach.
A vulnerability scanner never invokes a tool. A web application test scoped to the front end rarely reaches the agent sitting behind it. And testing a non-deterministic system once tells you about the attempt that failed — not the one that would have worked on the fourth try. Tooling and known playbooks alone will hand you a clean report and no assurance.
Four steps, sold separately. Most engagements start at the map, because you cannot test what nobody has inventoried.
AI and agentic systems are where we lead. The same adversarial discipline applies to the operational and embedded estate.
Autonomous agents with real credentials and real tool access, and the infrastructure underneath them.
Threat Mapping delivers in days. Full agentic testing runs two to four weeks, scaling with agent count and tool surface. We recommend staging or pre-production, and can test production under gated conditions.
Every finding we ship has been exploited, not flagged. If we could not prove it, it does not go in the report.
Agents are non-deterministic. We regression test to the point where the success rate stabilizes, rather than reporting whichever attempt happened to fail.
Averages hide the one workflow that fails every time. Risk is reported against the task the agent actually performs.
Documents, email, calendar, tickets, retrieved web content — not just the prompt box. Instructions arrive wherever your agent reads.
Not a library of stock jailbreaks replayed against you. Known playbooks are the first thing your existing tooling already caught.
Send an architecture diagram and a list of tools. We will tell you what we would attack first, and what we have seen in the wild.
Start a scoping conversation hello@severityzero.com